982 NODUL ARIA 
Nodularia (Lanceolaria) teretiusculus var. lithophaga “Zi%c- 
LER’ PaLLAry, Mem. Inst. Egypt., VI, 1909, p. 79. 
Nodularia terctiuscula (part), Simpson, Syn., 1900, p. 812. 
NOpDULARIA LEDCULXIANA (Charmes). 
Central Africa. 
The description of this species is not accessible to me, and 
I have never seen an authentic specimen. von Martens places 
it in the group of Unio teretiusculus. It has never been figured 
so far as I know. 
Unio ledoulxianus CHARMES, Bull. Soc. Mal. Fr, IT, 1885, p. 
173.—BourcuiIcnat, Moll. Af. Eq., 1889, p. 194.—voN 
Martens, Besch., 1897, p. 220. . 
Nodularia ledoulxiana Stmpson, Syn., 1900, p. 812. 
NODULARIA GAUDICHAUDI (Eydoux). 
Shell irregularly subelliptical, slightly narrower in front, 
apparently rather solid, inequilateral, convex ; beaks moderate- 
ly elevated, slightly sculptured; posterior ridge well develop- 
ed, narrowly rounded, ending behind in a blunt point about 
on the median line; anterior end rounded; base line straight, 
but very full behind the middle and obliquely truncated behind 
this point; dorsal line nearly straight; dorsal slope obliquely 
truncate; epidermis dirty greenish with brown, concentric 
bands; muscle scars well marked; nacre rose-purple. 
Iength 40, height 22, diam. 15 mm. 
Small streams of Bengal. 
Unio gaudichaudi Eypoux, Guer. Mag., 1838, p. 10, pl. cxvim, 
SS. 
Margaron (Unio) gaudichaudi Lea, Syn., 1850, p. 32; 1870, 
p50: 
Nodularia gaudichaudi Stimpson, Syn., 1900, p. 812. 
Nodularia cerulea var. gaudichaudii Preston, Rec. Ind. Mus., 
Vil. 1912 pa2se, 
There are some slight discrepancies between the descrip- 
tion and the well-executed, colored figure of this species. The 
latter shows the shell to be somewhat solid, with brownish, 
